Browser Use
by browser-use
Lets AI do web tasks for you, such as filling forms, searching and extracting data, in the maker’s cloud browsers or on your computer.
Computer or cloud★ 120,087MITUpdated 17 days ago
Install
sncro
Overview
Description from the maker (original English)
Live browser debugging for AI assistants — DOM, console, network via MCP.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
- UsageiNot measured yet★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs in the cloud
- Transport: Streamable HTTP
- Category: Web & browsers
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on the maker’s server: what you ask it goes through their server.
- The registry lists no key to fill in.
You need
- Runs in the cloudNothing to install; it connects over the internet
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
- Open Settings → Connectors
- Press Add custom connector
- Paste the address below and press Add
- If it asks you to sign in, sign in with the maker
https://relay.sncro.net/tools/mcpRun this in your terminal
claude mcp add --transport http sncro https://relay.sncro.net/tools/mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"sncro": {
"url": "https://relay.sncro.net/tools/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"sncro": {
"type": "http",
"url": "https://relay.sncro.net/tools/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
ChatGPT connects only to servers on the internet:
- Open ChatGPT on the web → Settings → Connectors (Apps)
- Press Create or Add (some plans need Developer mode under Advanced first)
- Paste the address below, give it a name and save
- If it asks you to sign in, sign in with the maker
https://relay.sncro.net/tools/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
We have not read this server’s tool list yet; we check endpoints in rotation.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account scottconfusedgorilla, which owns the repo
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- … Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
- … Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
- … Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint
Compared with others in Web & browsersi
- More stars than 0% of the other 881 servers in this category
- Published to the registry more recently than 9% of the other 881 servers in this category
- Basic checks equal to or better than 100% of the other 881 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is sncro safe?
It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
Is it still maintained?
The GitHub repo last changed –, and the latest version (0.9.4) reached the registry 7 months ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.
What can I use instead?
In the same category: Browser Use, Chrome DevTools MCP, MCP Server Browser
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Chrome DevTools MCP
by ChromeDevTools
Lets AI use Chrome’s developer tools to inspect pages, find what makes them slow and spot errors. Made by the Chrome DevTools team.
Runs on your computer★ 54,821Apache-2.0Updated 16 days ago
Install
MCP Server Browser
by bytedance
MCP server for browser use access
Runs on your computer★ 39,550Apache-2.0Updated 14 months ago
Install
README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
sncro-relay
Open-source components of sncro — the MCP relay, the browser-side agent, and the framework plugins that let AI coding assistants inspect a live browser.
What this repo contains
| Path | What |
|---|---|
relay/ | FastAPI app that exposes an MCP server plus long-poll endpoints for agent.js |
relay/static/agent.js | Browser-side script injected by the middleware; pushes console + DOM data to the relay |
middleware/sncro_middleware.py | FastAPI / Starlette plugin — drop-in middleware for FastAPI apps |
middleware/sncro_flask.py | Flask plugin — drop-in middleware for Flask apps |
trysncro/ | try.sncro.net — a deliberately-broken demo app for exercising sncro end-to-end |
How it works
┌──────────────┐ MCP ┌──────────┐ long-poll ┌─────────────┐│ Claude Code │──tools────▶│ relay │◀──────────────│ agent.js │ │ (or other │ │ (relay/) │ snapshots │ (injected │ │ MCP client) │◀──results──│ │──────────────▶│ by plugin) │ └──────────────┘ └──────────┘ └─────────────┘ ▲ │ same-origin │ cookies ┌─────────────┐ │ your app │ │ (plugin is │ │ installed) │ └─────────────┘
- Claude calls
create_session(MCP tool) → relay returns a 9-digit session key + URL - User visits the URL in the browser where their app is running → confirms via "Allow sncro debugging?"
- The plugin drops a cookie, agent.js is injected into subsequent HTML responses on that origin
- agent.js pushes baseline data (console, errors) and long-polls for on-demand queries (
query_element,get_page_snapshot, etc.)
Using sncro
Most users don't need to run the relay yourself — the hosted version at relay.sncro.net is free-tier friendly. Register your project at sncro.net and grab your project key.
FastAPI: drop middleware/sncro_middleware.py into your project, then:
from middleware.sncro_middleware import SncroMiddleware, sncro_routesapp = FastAPI(debug=True) # sncro only loads when debug=True if app.debug: app.include_router(sncro_routes) app.add_middleware(SncroMiddleware, relay_url="https://relay.sncro.net")
Flask: drop middleware/sncro_flask.py into your project, then:
from sncro_flask import init_sncroapp = Flask(name) if app.debug: init_sncro(app, relay_url="https://relay.sncro.net")
Both middlewares only activate in debug mode — zero overhead in production.
Contributing
We love new framework plugins. CONTRIBUTING.md has the full spec for what a plugin must do — cookies, routes, security headers — plus the test template. Django, Rails, Express, Next.js, ASP.NET, Go — all welcome.
Bug reports and security issues: see SECURITY.md.
License
MIT. See LICENSE.
The dashboard at sncro.net (project management, billing, admin) lives in a separate proprietary repo.